Drilling, screw-cutting, and other similar machine.



E. PEUCH & A. ARBEY.

DRILLING, SCREW CUTTING, AND OTHER SlMlLAR MACHINE.

APPLICATION FILED JULY 11. 1913. RENEWED DEC. 18.1911.

1,%54,933. Patented Jan. 29,1918.

5 SHEETS-SHEET I.

wewnws W/m EiFE E. PEUCH & A. ARBEY.

DRILLING, SCREW CUTTING, AND OTHER SIMILAR MACHINE.

APPLICATION FILED IULY 11, 1913. RENEWED DEC. 18.1917- 1,254,933. Patented Jan. 29,1918.

5 SHEETS-SHEET 2- I W f/wus fismmw /z. PA/U/VJE/REEY E. PEUCH & A. ARBEY.

DRILLING, SCREW CUTTING, AND OTHER SIMILAR MACHINE.

APPLlCATION FILED JULYII, m3. RENEWED DEC. 18. 1917.

1,254,933. Patented Jan.29,1918.

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APPLICATION FILED JULY; l9l3- RENEWED DEC- H.191].

1,254,933, Patented Jan. 29,1918.

5 SHEETS-SHEET}.

WWI/55555 4 44 5/7700: v wfim 2 fflmafisamw" L aMsz-ARBA-X .E. PEUCH & A. ARBEY.

DRILLING, SCREW CUTTING, AND OTHER SIMILAR MACHINE;

APPLICATION man .IULYH. m3. RENEWED DEC. I8. 1911.

Patented Jan. 29, 1918.

5 SHEETS-SHEET 5- Win 5555 UNITED STATES PATENT orrrcn.

EMILE rnuomor Bounces, AND ALPHONSE' ABBEY, or nnunn, rnancn.

DRILLING, sonnw-cn'r'rme, .ann o'rnnn SIMILAR. MACHINE.

Application filed July 17, 1913, Serial No, 779,535.

To all whom it may concern:

Beit known that we, EMILE PEUCH and ALPHONSE ABBEY, citizens of the Republic of France, residing the first at 12 Rue delObservatoire a Bourges, Cher, in the Re-' public of France, and the second at Beure, Doubs, in the Republic of France, engineers, have invented certain new and'useful Improvements in Drilling, Screw-Cutting, and other, Similar Machines, of which the following is a specification.

This invention relates to improvements in screw-cutting, drilling and other similar machines and more particularly to tool or piece carrying devices serving to catch and revolve either the tools or the pieces to be drilled, screw-cut and the like. I

The invention consists in the first place in combining with such carrying devices one or more clutching devices operating by the axial displacement of one of the clutching parts with regard to the others and suitable means for displacing axially the said clutching parts for different purposes such for inv stance as that of clutching a drilling or screwcutting tool alternatively with a driving member revolving in one direction and with another driving member revolving in the reverse direction or with a stationary member serving to stop such rotation.

The invention consists also in using a clutching device comprising a series of balls which are placed both in a circular ballbearing on one of the clutching parts, and in recesses provided in the other clutching part, such recesses being'so shaped that the balls are wedged between the two parts by an axial displacement of one of the latter with regard to the other.

Other features of the invention are described with reference to the accompanying drawings, in which Figure 1 is an axial section of a tool-carrier with automatic clutching.

Figs. 2 and 2* are transversal sections on the lines UU and V V of Fig. '1.

Figs. 3 and 3 which must be assembled on the line X-X, show a longitudinal section of a screw-cutting device having an au-, tomatic lock and stop and a quick return.

Figs. 4 and 4, which must be assembled tain'parts are shown in section.

v wedged between I) and a.

Specification of Letters Patent. Patented J all. 29, 1918.

Renewed Deceniber 18, 1917. erial No. 207,797.

on the line Y-Y, show a plan of a drilling and screw-cutting machine; in

Fig. 5 is a vertical section on the line Z'Z of Fig. 4, and Fig. 6 a vertical section on the line W-W of Fig. 4".

The tool-carrier shown in Figs. 1, 2 and 2 is designed more'particularly to receive a screw thread cutting tool; it comprises a set of balls a placed between two members I) and 0 the former of which has a circular ballbearing b for the balls (I and the latter of which has a certain number of recesses .0", in .its peripheryv to receive such respective balls; each of the recesses has, in the direc-' tion perpendicular to the axis of the members b and c, a V shaped cross-section, and the bottom of such recess is inclined with regard to such ax'is, 'so that by a suitable axial displacement of one of the members with regard to the other, there can be obtained a clamping of the balls between the ball-bearing and the faces of the recesses,

screws if; it can be displaced axially with regard to b and is subjected to the action of a spring 0! which tends to hold the balls it Such apparatus comprises also a pawl and ratchet device which can be reversed according as to whether the screw-cutting is to be done to the right or to the left, and which serves to rotate the screw thread cutting tool in the unscrewing direction; in this example, the pawl and ratchet device is constituted by the balls z rolling in a circular groove b of the member I) and placed in the recesses j of the screw thread cutting tool, the

Fig. 4 cer- 'c is associated with the head of a screw thread cutting tool carrier h by means of duce the wedging of the balls 11 and the rotating of the screw thread cutting tool in the desired unscrewing direction; the same balls may be placed in the recesses 7' inclined in the opposite direction, to insure.

the spring d to hold the balls (1 wedged between 6 and 0.

The present tool-carrier will be generally mounted on a carriage having reciprocatory motion, which will be pushed by the operator toward the'piece to be threaded up to a position in which it is stopped bysmtable means, and then bring it back to disengage the screw thread cutting tool from the threaded piece, by acting on an apparatus reversing which reverses at the same time the rotationof the tool-carrier. Such con trolling means have not been shown in Figs. 1, 2 and 2. N

When the carriage carrying the tool reaches the end of its stroke, which is limited by a stationary stop, the operator acts on the running changer to produce the unscrewing of the screw thread cutting tool; it will be understood that if, at the time of the sudden stop of the carriage,'the screw thread cutting tool were to remain clutched even for a very short time with the mem-, ber' b,,there would be reason to fear a breakage of the screw-threads formed. Although the change of running cannot be effected instantaneously, such danger is now'avoided because the screw thread cutting tool, in continuing to screw itself on the piece being worked after the sudden stop of the carriage, advances still farther in the direction of the arrow C and is, consequently, immediately unclutched from the member 6. The latter can then continue to revolve without any inconvenience, as the screw thread cutting tool is no longer revolving on the threaded object. At this time, the balls 2' allow furthermore of the stoppage of thescrew thread cutting tool by reason of the inclination of the recesses j in the suitable direction.

On the other hand, as soon as the running is changed, the screw thread cutting tool is carried in the unscrewing direction through the medium of'the balls 2'. When the screw thread cutting tool is completely disengaged from the threaded piece, the

' member 0 becomes free in the axial direction and is again clutched with the member I) under the action of the spring d; the apparatus is then ready for another operation.

If the screw-cutting is to be done to the left, the parts it and c are separated by unscrewing the screws k and the balls 5 are aeeaeaa Figs. 3 and 3 show a screw threading 'device of thes ame kind as that of Figs. 1, 2 and 2* but provided with braking'devices and a quick return. The die holder h dif fers from theformer one by the omission of. the clutch parts Z, j andj. It is mounted on the shaft 0 mounted in the hollow shaft 6 and coupled thereto by the balls a by means of a spring 03 between the shafts.

The shaft b is rotated by the belt pulleye and is fixed against longitudinal movement on the carriage k which is reciprocated by the operator by means of a lever is through the medium of a toothedsector k and rack 70 The shaft 0 carries-at the end opposite the die holder a cup-shaped clutch memberwhich cooperates with balls in turn cooperating with a stationary conical vclutch member. These parts constitute a braking device for stopping rotation of the die carry ing spindle. The work is held in the collet chuck m carried by the hollow spindle or shaft m (Fig. 3). The collet is formed on the end of a rod slidably carried in the shaft, the rearend of which carries an adjustable collar between which and the end of shaft-'m a springim is arranged which holds the collet normally in closed position. The shaft m is supported in the stationary bearing f and is rotated by a belt driven pulley 6 through a clutch,. one element 'of which is formed in the pulley and the other element is normally urged into yielding engagement therewith. The movable clutch member 0 is formed on a sleeve splined to the shaft m Balls a are interposed between the clutch members 6 and 0 'The work is rotated at less speed than the die carrier but in the same direction, "this resulting in, a threading speed equal to the difference of the two. speeds and also having the advantage of providing a rapid unthreading of the die or threading tool.

n designates a screw pusher serving to push back the mandrel against the action of the spring m so as to release the piece being worked; in this same movement, the

pin m carries a'xially forward the clutch-' ing member 0 so that the latter is then unclutched and the rotation of the mandrel is brought to a stop.

The operation of this machine is as follows During the screw-cutting, the piece being worked revolves at a speed '0 without being displaced axially, while the screw-cutting tool revolves at a speed V in advancin in the direction of the arrow 0. At the time when the carriage bearing the tool is brought to a stop by a stationary stop (not shown), the tool continues to revolve and to advance for a short time, in becoming unclutched from the member I) as soon as it has been displaced axially with regard to the latter. Almost immediately, the member 0 which is carried forward by it, clamps or looks the balls at on the stationary piece It so that the rotation of the tool-carrier is brought to a stop. On account of such stoppage, the relative speed of the tool and of the piece being worked becomes v instead of V- v,' so it is changed in direction andbecomes greater in absolute value, so that the unscrewing is produced at a rapid rate. During such unscrewing, the operator pushes the carriage in a direction reverse to the arrow C so as to maintain between the threads of the tool and the screw-cut piece such a reaction that the balls a remain wedged between 0 and k and that the balls a remain free between 6 and c. When the threads are disengaged from one another, the spring d restores the member 0 to the normal position in releasing it from the stop piece and in clutching the same again with the carrying forward member 12 Then, all that need be done is to operate the pusher n to disengage the piece worked from the mandrel m; afterward a fresh piece can be secured in the mandrel and can be worked in the same manner as the previous one.

The machine so fitted is an extremely simple one, exempt from any cumbersome mechanism and can be easily and quickly handled; it can be adapted to do any screw-cutting or forming work.

Figs. 4 to 6 show a drilling and screwcutting machine, comprising a work-bearing carriage p, a tool-bearing carriage g, and a main frame 9 on which are secured the slide-ways p 9 serving to guide such carriages in two perpendicular directions.

The displacement of the work-bearing carriage p is obtained for instance by means of an eccentric 12 provided with an operating lever p and a link [2 connecting such eccentric with the carriage; the displacements of the latter are limited by two abutting screws 12 and p.

The piece to be worked a is secured to a mandrel p which can be turned by means of a lever 12* and can be fixed in the required positions by means of a spring stop 20* which engages in the slots of a plate p 'associated with the said mandrel; this arrangement is for the purpose of allowing the drilling and the screw-cutting of several holes in the same piece a without having to dismount the latter.

The fastening of the piece a in the mandrel p is obtained by means of a slidable rod 2 one end of which is enlarged in conical shape, recessed to receive the piece a and split in the form of a cross, while the other end is screw-threaded and carries a hand wheel 12 forming a nut.

The tools consist of a drill t and of a tap rounds the shaft u Both the pulleys t I and u revolve in the same direction.

Around the shaft u is placed another sleeve u provided with a pulley u which is revolved continuously in the direction re- .7

verse to the arrow D by means (not shown). 1 I

The shaft u carrying the tap can be coupled alternatively with the sleeves u and u by means of clutching devices of the kind hereinbefore described; a set of balls at are placed in the circular ball-bearingv b" of. the sleeve 10 and in inclined recesses'e which are made in an enlarged part of the shaft it, the inclination of the said recesses being such that the wed 'ng is produced when the shaft is displace in the direction reverse to the arrow C with regard to the sleeve u; furthermore, a set of balls (1 are placed in the ball-bearing b of the sleeve u and in the inclined recesses c" which are made in of a strap the annular ring a secured on the shaft 10 e the inclination of the said recesses being such that the wedging is produced when the shaft u is displaced in the direction of the arrow C.

The shaft u is indeed slidable in the sleeves a and u; a spring at bearing on the sleeve u pushes the same constantly in the direction reverse to the arrow C.

- To displace the carriage g, the operator operates with the right hand a lever jointed at g to the slid'eway and at g to the carriage g.

Assummg that it is desired to bore and screw-thread two holes a and s in the piece 8. v

The operator, holding in the first place the latter inhis right hand, turns with his left hand the hand wheel 12 so as to open the split head of the rod p and he places in the latter the piece 8 in giving it a suitable direction; then he turns the hand-wheel 72 so as to tighten the said split head onto the piece 8. With his left hand, he operates the lever 12 so as to bring the carriage 9 against the screw 12-; the point of the piece 8 where the hole 8 is to be bored is thus brought in front of the drill t. In pushing the lever q with his right hand, the operator then pushes the carriage g in the direction of the arrow C, so that the drill, which revolves continuously, bores the hole 8 When the carriage q is brought to a stop by the abutting screw 9 the operator brings it back 1n the direction reverse to the arrow C, so as to remove the drill from the hole.

, Then the operator turns the lever ga so as to revolve the mandrel and the piece 8 to such an angle that the point of the piece 8 Where the second hole 8 is to be made'is brought in fr0nt of thedrill. Such second hole is then bored in the same manner as the previous one; I

Afterwardgthe operator turns the lever 10* so asto bring'the carriage 19 against the screw p, the latter being so regulated that V i the hole 8 comes in front of the tap u. The

carriage 9 being pushed toward the piece 8, the tap is engaged in the hole 8 and produces the screw-threads therein by reason of the fact that the resistance opposed to its advance is added to the action of the spring 03 for the purpose of wedging the balls 0 in the corresponding recesses and of getting the shaft u carried forward by the sleeve u When the carriage impinges against the screw 9 the shaft a continues to advance slightly only on account of the screwi ng of the stock into the hole 11?, so that the wedging of the .balls at ceases and the shaft 11 is unclutched; so the stoppage of the tap is produced automatically.

The operator thenbrings the carriage g back in direction reverse to the arrow 0 by means of the lever 9 the sleeve a which revolves in the direction inverse to the arrow D, carries forward the shaft u through the a and such hole a is then screw-threaded in the same manner as the previous one. Q

It will be 7 understood that the machine just described can be modified by the addition of other tools, drills, threading dies and the like, before which the pieces to be' worked would be brought successively.

llhe clutching-devices having balls of the ass sses character described may also be replaced by other clutching devices having a wedging, frictional or other similar efi'ect.

Claims:

1. In a device of the character described, a sleeve having on one end a cup-shaped enlargement provided with an interior annular groove; a shaft in said sleeve and having a head having longitudinal grooves therein; a spring on said shaft and yieldabl drawing said head into said cup; and bal s engaging in said annular groove and each engaging in one of said longitudinal grooves. a

2. In a machine of the character described, the combination of a carriage; a sleeve journaled in said carriage and having an enlarged member at the inner end; a pulley on said sleeve; a shaft passing through said sleeve and having, an enlarged member on the outer end, and one on the inner end associated with said first named member; an additional member associated with said member at the outer end of said shaft; one of each pair of adjacent associated members being provided with an annular groove, and the other with a plurality of longitudinal grooves; and balls in said annular grooves and each engaging a longitudinal groove.

3. In a screw-cutting machine the combination of a carriage; a sleeve journaled in said carriage; and having at its outer end a cup having an annular groove therein; a pulley on said sleeve; a shaft passing freely through said sleeve and having at the inner end a flaring head having longitudinal grooves therein; balls each engaging in one of said longitudinal grooves and the annular groove; a spring around said shaft and yieldably drawing said head in said cup; an enlarged member on the outer end of said shaft; an enlarged member carried on the carriage; one of said members havinga, face provided with longitudinal grooves, the

other member having an annular groove; and balls each engaging in said last named annular groove and one of said last named longitudinal grooves.

In testimony, that we claim the foregoing as our invention we have signed our names in presence of two subscribin witnesses.

- EMILE P UCII.

ALPI-IONSE ABBEY. Witnesses:

LEON RIMONDY, MAURICE Roux. 

